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Currently, all variables (global and local) reflect information about
the current symbol only.
To perform calculations against multiple securities, you must use
AddToComposite which restricts the user to O,H,L,C,V,OI fields along
with their pre-defined constraining formats which preclude the
calculation and storage of very large numbers. It also usually
requires at least two passes against separate AFL or AFL/IB afl code
to work with the results. There is certainly a need for
AddToComposite, but I think there is also a need for a simpler set of
composite values.
I'd like to see a new variable class within AFL for computations
across the entire database or watchlist. For lack of a better word, a
"composite variable" whose value is maintained across multiple
securities and which the AFL engine does not initialize with each new
symbol. Also, a composite variable that can be displayed with
AddColumn just like the other variables using Filter = LastBar logic.
This would allow the user to put together some quick, one-pass
explorations for calculating multiple issue stats and to display those
figures in the same afl. No ~Composite files would be created, and
very large numbers could be calculated and displayed using more
flexable variable type declarations of float (or others).
I'm posting this here to see if I am alone in wanting this feature, in
which case I won't pass it along to TJ as a suggestion.
Comments?
Phsst
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